About Geothermal Heat Pump Electricity Savings

[delta]

Hi, all

I am new to Geothermal Heat pump technology and its deployment throughout the nation. Although, I am excited about learning more about it and how could it help to go green.
At this point, I have some technical/economical question:
When one installs geothermal heat pump, it is said that they offset the electricity bills by 25-70% depending upon different factors. Is there any way or any kind of meter, that will measure it accurately that how much heat/cooling energy was generated, and how much electricity was saved exactly? So that an owner of house/facility will know, whether is savings in bills is actually lower consumption or savings due to geothermal heat pumps.

I will appreciate any idea/suggestions/comments on this topic. Thank you, for your time.

Kaushal

[gabby]

In your comparison, are you talking new construction or existing home demand? If the latter, then a wattmeter will measure your new load that you can compare to your old system, or just look at your past KWH usage (monthly electric bill) to the new for the same house demands.

[engineer]

There are ways to measure what you ask, but the instrumentation may be cost prohibitive and generate data difficult to properly compare with prior systems' costs.

Every month's, every season's weather is substantially different from the months or years before, making it hard to correctly conclude relative costs and efficiencies of various systems. Careful attention must be paid to climate data in order to reach valid conclusions.